Adastra BH3 User manual

BH SERIES
Background Speakers
User Manual
Introduction
Thank you for choosing the Adastra BH series speakers for your sound installation.
These durable cabinets deliver reliable, high quality sound output for music and announcements. Please
read the following guidance notes for correct installation.
Contents
2 x BH series background speakers
4 x cross-head screws
2 x steel speaker brackets
4 x speaker screw caps
2 x plastic wall plates
Specifications
Model
BH3
BH4
BH5
BH6
BH8
White stock ref.
100.916UK
100.918UK
100.920UK
100.922UK
100.924UK
Black stock ref.
100.917UK
100.919UK
100.921UK
100.923UK
100.925UK
Impedance
8Ω
Dispersion angle
120°
IP rating
IP44
Power handling max
60W
60W
100W
140W
160W
Power handling rms
30W
30W
50W
70W
80W
Frequency response
110Hz - 20kHz
100Hz - 20kHz
80Hz - 20kHz
50Hz - 20kHz
30Hz - 20kHz
LF driver
75mmØ (3“)
100mmØ (4“)
135mmØ (5.25”)
165mmØ (6.5”)
200mmØ (8”)
HF driver
13mmØ (0.5“)
13mmØ (0.5“)
13mmØ (0.5“)
25mmØ (1”)
25mmØ (1”)
Sensitivity
86dB
88dB
89dB
90dB
90dB
Dimensions (each)
164*107*102mm
195*127*126mm
255*163*160mm
290*195*190mm
378*244*240mm
Weight (each)
0.83kg
1.23kg
1.98kg
2.70kg
3.98kg

BH Series User Manual
Installation
1. Unscrew the plastic wall plate from the speaker bracket and mark out,
drill and fix to the wall as required.
2. Line up the steel speaker bracket against the plastic wall plate at the
required tilt angle and secure using the 2 screws provided through 2 of
the punched holes.
3. Locate the speaker into the speaker bracket and secure using the screw
caps provided on the top and bottom.
4. Adjust the horizontal angle (pan) of the speaker by loosening the screw caps, turning the speaker and
re-tightening the screw caps.
5. Remove the cover on the rear of each speaker to reveal the spring
terminals.
6. Each BH speaker has 8Ωimpedance.
Ensure the total load connected to each output channel is no lower
than the minimum stated for the amplifier.
Connect 1 BH speaker for an 8Ωload or
connect 2 x BH speakers in parallel for a 4Ωload
7. Use good quality 2-core speaker wire capable of carrying the rated
power and connect to the speaker terminals. Strip back the
insulation, press down the terminal, thread the wire through the
terminal post and release to grip the bare wire.
8. If installing in sheltered outdoor areas, fit the cover over the rear terminal cavity to protect the wiring
from moisture.
9. Connect the + and - terminals on the speaker to the relative outputs on the amplifier as shown in the
diagram above.
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as
Electrical or Electronic equipment and should not be disposed with other household or commercial waste
at the end of its useful life. The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted. Copyright© 2022. AVSL Group Ltd.
Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ
AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland